85177990 has 32 divisors (see below), whose sum is σ = 164649024. Its totient is φ = 31610880.

The previous prime is 85177979. The next prime is 85177997. The reversal of 85177990 is 9977158.

It is a self number, because there is not a number n which added to its sum of digits gives 85177990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85177997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8542 + ... + 15598.

It is an arithmetic number, because the mean of its divisors is an integer number (5145282).

Almost surely, 2^85177990 is an apocalyptic number.

85177990 is a deficient number, since it is larger than the sum of its proper divisors (79471034).

85177990 is a wasteful number, since it uses less digits than its factorization.

85177990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7152.

The product of its (nonzero) digits is 158760, while the sum is 46.

The square root of 85177990 is about 9229.1922723497. The cubic root of 85177990 is about 439.9896519605.

The spelling of 85177990 in words is "eighty-five million, one hundred seventy-seven thousand, nine hundred ninety".